Colt A4

Wow, Ive been away from FTF for 5 months. Im sorry. Glad im back. Anyways, I think its time for my first AR. Served in Iraq with the Corps with an issued A2. Because of this I have some certain preferences I cant kick. First of which is I want a 20" barrel. But, instead of an A2, I want to build an M16A4 clone or A4gery. I still want the longer barrel, but I want the removable rear sight housing group (we dont use handles in the Marines). I would also like to keep it a Colt. I am thinking the Colt MT6700 would be the best platform to work off of. I tried doing some simple google searches and cant find it. So Im seeing if you guys have any info on where I should try and look to find one.

__________________كافر-INFIDEL

"The Marines I have seen around the world have, the cleanest bodies, the filthiest minds, the highest morale, and the lowest morals of any group of animals I have ever seen. Thank God for the United States Marine Corps." Eleanor Roosevelt, 1945

Good luck. Most AR15 models are sold. A lot of manufacturers are holding production to see what happens. I hope you find what you want but it is gonna be hard. If I was you, I'd get any 20' AR you can find. Because that in itself will be difficult.

Wow, Ive been away from FTF for 5 months. Im sorry. Glad im back. Anyways, I think its time for my first AR. Served in Iraq with the Corps with an issued A2. Because of this I have some certain preferences I cant kick. First of which is I want a 20" barrel. But, instead of an A2, I want to build an M16A4 clone or A4gery. I still want the longer barrel, but I want the removable rear sight housing group (we dont use handles in the Marines). I would also like to keep it a Colt. I am thinking the Colt MT6700 would be the best platform to work off of. I tried doing some simple google searches and cant find it. So Im seeing if you guys have any info on where I should try and look to find one.

Welcome back!

Boy did you pick A bad time to buy an AR.

You are going to pay much more now than you would have a month ago.

Consider just buying a stripped lower and begin building your long a-forgery .

The are many removable rear sight housings.
I am not a fan of the magpul mbuis but there are some great alternatives.

Yes, it's a hard time now to find what you want. No way of knowing when you'll find what you want in stock. If you can't find the Colt you might also want to watch BCM and PSA as you can get upper receivers very much like the M16A4. You could build up a good lower receiver and end up with an "A4gery.

Here's a link to PSA's 20" A4 style uppers, all out of stock of course. PSA uses FN barrels and of course FN now supplies the M16A4, winning that contract over Colt.

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The biggest issue with assembling an AR isn't so much getting the parts together right - it's getting the right parts together.
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US Army 1966-69, VFW Life Member, Retired Geek

There are plenty of new and used Colt Match Target rifles and carbines available on GunBroker. I'm not sure I'd pay the asking prices, but they are available. There are, or were, some actual M16A4 uppers and/or barrels available. If you get a Match Target rifle or carbine, you get a heavy vs government profile barrel. If you don't care for the extra weight up front, you can purchase a government profile barrel (also available on GunBroker).

If you are not completely wedded to the M16A4 platform, I'd suggest getting a carbine buffer tube, buffer, spring, and stock. I like adjustable length of pull for use with optics. I like the MagPul CTR, but you could get a Colt Defense / Rogers Super Stoc if you're obsessed with using Colt parts.

I would make sure you get a "small" pin lower, though. Parts for "small" pin, vs Colt "large" pin lowers are easier to come by. I think Colt stopped making "large" pin lowers in 2009.

Small Trigger Pins: .154"
Large Trigger Pins: .170"

Large Front Takedown Pins: .315"
Small Takedown Pins: .25"

There are various model numbers that Colt uses to refer to very similar rifles that fit the description of what you say you want. The MT6700 is the closest Civilian rifle model to what you said you were after. Several of the ones I've seen advertised were obviously small pin (more desirable) and brand new. To make it a clone of the M16A4, you'd have to find an undrilled Colt front sight block with a bayonet lug and then thread the muzzle for a flash suppressor. Good luck with that. By the time you get done with all that, you'd probably have been better off just buying a Colt M16A4 barrel or upper assembly.

I'm not completely sure which bolt carrier assembly the MT6700 comes with, but you may also have to purchase a Colt full auto bolt carrier assembly. Again, it all depends on how close you want to get to a M16A4.

If it were me, I'd just get a Colt M16A4 upper and then mount it to your lower of choice. Colt makes quality lowers, but they're nothing special in the realm of forged lowers.

If GunBroker doesn't have what you want, there is also GunsAmerica and GunAuction. There are others that I go to, but the names aren't coming to me off the top of my head. Google, or your search engine of choice, is your friend.

Specialized Armament can supply the small Colt parts for your build. Again, a little Googling can turn up little caches of parts here and there.

Thank you for your service and sacrifice so that the rest of us have the privileges that we do.